An FM broadcasting transmitter is a type of radio station that is used for audio broadcasting. The frequency range is from 50 Hz to 15 kHz for monophonic listening. There are also subcarrier frequencies that run from 23 kHz to 53 kHz and are designed for 2 channel stereo and quadraphonic listeners. Besides these, there are also specialized broadcasting transmitters that offer a particular feature.
Although broadcasting transmitters exempt from CRTC licensing must still meet the authorization requirements, they can still be used for other purposes. However, there are many different applications for radio transmitters. Those who wish to operate a radio station may choose to build an FM transmitter in their own backyard.
A transmitter in this frequency range needs to be licensed, so the ITU publishes a list of frequencies that are not allowed in their frequency range. There are also non-standard spacings in FM broadcasting. They range from 1, 10, 30, 74, 500, and 300 kHz. These spacings help reduce inter-channel interference. The ITU has published protection ratio graphs that show the minimum spacing between radio frequencies based on their relative strengths. In addition, unauthorized FM broadcast transmitter antennas are subject to disciplinary action.
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